Friction driving mechanism.



M. L. JENKINS.

FRICTION DRIVING MECHANISM.

APPLICATION FILED MAR.20,1912- 1,1 10,793, Patented Sept. 15,1914

3 SHEETS-SHEET l.

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M. L. JENKINS. FRICTION DRIVING MECHANISM.

APPLICATION FILED MAR.20, 1912- Patented Sept. 15,1914.

3 SHEETS-SHEET 2.

INVENTOR M. L. JENKINS.. FRICTION DRIVING MECHANISM. APPLICATION FILED MAILZU. 1912' tion, I attain by means of a construction driven wheel; the provision of a novel shift line 11-11 of Figure 1.

unrrn s'rar -1 '1" NT OFFICE.

MERRILL L. JENKINS,

CHICAGO, ILLiNoIs, A

FRICTION DRIVING MECHANISM.

Application filed March 20,

To all whom it may concern:

Be it known that I, MERRILL L. JENKINS, a citizen of the United States, residing at Harvey, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Friction Driving Mechanism, of which the following is a specification. I

My invention relates generally to improved transmission mechanism for use in motor vehicles, such as for example railway tracks cars or the like. It has for its principal objects the provision ofa driving friction disk having longitudinal movement for engagement with and disengagement from a driven wheel; the provision of improved means imparting longitudinal movement to a friction disk for frictional contact with a thrust mechanism adaptedto effect contact between transmission members and a thrust bearing between the thrust mechanism and the movable 'member; the provision of a friction disk mounted on a driving shaft having positive rotation therewith and reciprocative movement thereon; and the provision of means adapted to afforded uniform pressure and prevent jamming between friction members brought into contact. v

These and such other objects as may hereinafter appear or are incident to my invenillustrated in preferred form in the accompanying draw ngs, where1n:

Figure 1 is a plan view of the chassis of the track car provided with my improved mechanism.

Figure 2 is a sectional view through the Figure 3 is a side elevation of the operating mechanism.

Figure 4 is an enlarged detail of Figure 3.

Figure 5 is a section through the shift thrust mechanism. I

In carrying out my invention as disclosed in the drawing and shown applied to a railway track car, I provide the frame 6 in which the wheels 10 are mounted and which carries the platform 9 and outboard 11. The motor 8 is supported by the cross-pieces 7 rigidly secured to the frame 6 of the track car.

The driving mechanism comprises a fric- Specification of Letters Patent.

Patented Sept. 15, 1914. 1912. Seria1No.685,100.

tion driving disk 12, adapted to engage with itsface the periphery of a driven friction wheel 13, the latter being, shiftably mounted on the splined jack shaft 1 1 for movement from and toward the center of the disk 12. The rear aXle 15 is driven in the usual manner from the shaft 14 through the media of the sprockets 16 and 17 and the drive chain 18.

The friction or driving disk 12 is provided with a hub portion 12 and is mounted for reciprocative movement on the shaft 19 1 and brought into and out of engagement with the driven wheel 13 by means of the shift thrust mechanism clearly shown In Figure 5 andto which reference is now more particularly made.

Fitted over the squared end of the motor shaft 19 is a cylindrical sleeve 20, correspondingly shaped internally to permit rotation of the sleeve with the shaft. The

sleeve 20 is provided at its forward end withv an annular flanged portion 21, to the face of which is rigidly secured the hub portion 12 of the friction disk 12, by means of the cap screws 22. Through this arrangement the driving disk has rotative movement with the shaft. Any undue stress placed upon the cap screws is overcome by means of the sheer washers 23, through which the cap screws pass, and which rest in corresponding recesses in the flange 21 and hub portion 12 of the disk.

Positioned about the sleeve 20 and to the rear of the flange 21 is a stationary bearing member 25, having a portion of its length externally threaded as at 29, and provided with a rear flange 27 secured to the forward end of the crank case 28. Between the statlonary member 25 and the sleeve 20 is a bushing 24: affording a bearing for the sleeve, and fastened by a set screw 26 to the member. 25, so that when the sleeve is given forward movement on the shaft to effect an engagement between the disk and wheel, the bushing is held against movement therewith. Thenumeral 31 indicates a; shift member or collar interiorly threaded as at 30 and mounted for turning movement on the externally threaded portion 29 of the stationary member 25 intermediate the flanges 21 and 27 as in Figure 5. I pref erably form the collar 31 with a rearwardly extending hub portion terminating at a point short of the flange 27, order to afford a greater bearing surface between the threaded portions 29 and 30.

One of the important features of my invention is the interposition of means between the shiftable member 31 and the disk i of which are fitted on to the slightly smaller diameter-ed forward portion thereof. The shift member '31-is provided with an annular casing or housing 33 flanged to engage the outer ring, whereby the ring cooperates with the shift member when the latter is reversed, carrying with it the flangedsleeve and the disk, as will be read ily understood from an inspection of the drawings.

The squared end of the shaft 19 is cored and threaded for the reception of a cap screw 34 which holds the washer 35 in position at the end of the shaft. This washer having a larger diameter than the shaft limits the movement of the sleeve '20 on actuation toward operative POSllZlOIl.

' Figures '2 to a inclusive disclose the operating means for actuating the sh ft thrust mechanism which brings the frlction members into and out of contact, A thrust lever 36 is secured by the set screws 37 to the inner face of the flange 31, and the free end of the said lever fits easily into a forked member 38. This fork 38 is provided with an integral finger 39 which projects into a hollow connecting rod 1O, the latter being provided with an enlarged portion 41 at its lower extremity which abuts the shoulder 12 ofthe forked member 38 Secured to the latter is a cage 43 which is also positioned about the lower end of the rod 40 and incloses a tension spring 14 arranged around that portion of the rod within the cage, the said spring taking against the enlarged portion 41 and the conoidal end'of the cage. At the upper end of the rod 40"is a knuckle 4C5 furnishing 'an adjustable, connection between the rod and the operatin or starting lever 46 which is positioned in the platform 9.

The operation of my invention is substantially as follows: Normally the friction disk is out of engagement with the driven wheel,

and on actuation of the operating lever 46 from its normal position a downward movement is! imparted to the thrust lever 36, which communicates a shifting movement to the shift collar 31. M

This movement is imparted to cooperating ring 32 within the casingj33, and also to against the hub'of the disk 12 bringing the" diskinto engagement with the driven wheel In its forward movement the disk 12 carries with it the sleeve 20; the stop washer 35 serving as a limitation in this change of position. Relative movement of the sleeve is not communicated to the bushing 24c, ,a's

the latter is secured to thestationary bear ing 25 in the manner already set forth.

Reversing the lever returns the disk to its normal position through the brought to bear by theouter ring or rings against the larger diametered portion of the sleeve flange 21.

The

gagement of the disk from the wheel is ma terially assisted and shock lessened when the operating lever is reversed. I

Jamming friction between the disk and wheel when engaged, is overcome through the interposition of the spring in the lever mechanism, thereby tending to obtain a more uniform pressure. between these members, dissipating the shockand jar usually present in transmissions of this character. Other advantages will be readily perceived by those skilled in the art. I

Having thus described my invention and illustrated its use what I claim as new and desire to secure by Letters Patent is the following 1. The combination-with a shaft, of a sleeve on the shaft provided with a flange portion, a disk carried. the flanged sleeve, means for advancing and'retracting the said disk comprisinganinternally threaded movable member about the sleeve and a stationary threaded member interposed therebetween, with means fitting about the said 7 flanged portion and in cooperative relation with the said shift member.

2. In a motor vehicle, the combination of a motor, a shaft therefor, a friction driving.

pressure" sleeve 25 may be provided with lefthand threads 29, and with the crank shaft disk'slidablymounted on the shaft, a driven wheel, means for moving the driving disk into and .out of engagement with the driven wheel comprising a shift member and one or more movable rings interposed shift member and the driving disk.

3. The combination with a motor and its shaft, of a drivenwheel, a driving diskon said'shaft, means about said shaft for advancing the disk relatively of the shaft to engage the-wheel, said means comprising a bearing member flanged for purposes of attachment to the motor. casing whereby it is held against communicated movement, and

120 between the r I inga shift member positioned I a thrust device turnable on said bearing a member to advance the disk. C

4. In combination, a shaft,fa driving disk slidably mounted on the shaft, a driven wheel, means to move ,the, driving disk rela tively of the shaft into and out-of driving engagement with the driven wheel compristo the rearof the disk and a thrust bearing interposed therebetween and cooperating with theshift substantially as described.

5. Ina motor vehicle,

member to advance, and retract the disk,

an engine, a shaft therefor havingyasquared,

w an engine, a shaft therefor having a squared end, a bearing member, a sleeve mounted on the squared end of the shaft within the bearing member, a driving disk carried by the sleeve, a driven wheel, a shift member mounted on the bearing member adapted to move the driving disk into and out of engagement with the driving wheel, a plurality of relatively movable members mounted on the sleeve between the shift member and the driving disk, a casingmounted on the shift member and inclosing the plurality of movable members,and'means for moving the shifting member.

7 In a device of the character described, the combination of a driven wheel, a drive shaft, a rotary driving disk on said shaft, means about the shaft for advancing the disk relatively of said shaft to engage the wheel comprising a bearing' member. and a movable member, said movable member being capable of having turning movement on the bearing member relative the axis of the shaft and in a direction opposed to that of the disk, and means for actuating the mov: able member. i

8. In a motor vehicle, the combination of a driven wheel, a drive shaft, a driving disk,

rotative with the shaft and movable longitudinally thereof into and out of engagement with the driven wheel, and a thrust mechanism for moving the, disk into and out of engagement'with the wheel, said mechanism comprising relatively fixed and movable members, and an antifriction element interposed between the said movable member and the disk and capable of engaging the disk to retract it to disengaged position.

thecombinationof lbination of adrivenwheel, a drive shaft, a

shifting said Q disk, and actuating.. means for anl uniform press "ber provided e 9, The combination in a .motorr vehicle in; of a driving shaft, an exteriorly threaded bearing. member, a sleeve on theshaft and a rotatable therewith, a driving disk mounted :onithersleeve, adriven disk, a bushing b-.'

tween thesleeve and the, bearing member, a "collar having a threaded internalvportmn engaging with the threaded bearing member,

bearing members on the sleevebetween the collar and the driving d sk,-and a casing for 'the bearing members mounted on *the collar;

10. In a transmission mechanism, the comrotary driving disk on said shaft, means for movablein a directionopposed to that of the said last mentioned means comprising a fixed arm, an operating lever, and a yieldingeonnect-ion interposed therebetween, so arranged whereby to prevent jammingifrictioniand obtain ure between the 1 driving. and driven member when in engagement.

11. In a motor vehiele,th e combinationof an engine, a shaft therefor, a bearing mem- Wlth threads, a sleeve mounted 1 on the end of the shaft and fitting the interior of the bearing member, a driving disk carried by the sleeve, a driven wheel, and a threaded shift member engagingthe threaded bearing member adapted to move the driving disk into and out of engagement with the driven wheel substantially as described.

12. In a motor vehicle, the combination of an engine, a shaft ber providedwith on the end of the shaft and fitting the interior of the bearing member, a driving disk carried by the sleeve, a driven wheel, a

threaded shift member engaging thethreaded bearing member and adapted to move the driving disk into and out of engagement with the driven wheel, cooperating with a thrust bearinginterposedbetween the shift member and the driving disk. I

13. In a motor vehicle, the combination of an engine and a shafttherefor, a bearing member, a sleeve slidably mounted for relative movement on the end of the shaft and fitting within the bearing member, a driving disk carried by the sleeve, a driven wheel, and a shift member mounted for movement on the bearing member and provided with a ring fitting the sleeve adapted to move the driving disk out of engagement with the driven wheel.

14:- In a motor vehicle, the combination of an engine and a shaft therefor, a bearing member, a sleeve slidablymounted on the end of the shaft and fitting within the bearing member, a driving disk carried by the sleeve, a driven wheel and a shift member mounted for movement on the bearing member and adapted to move the driving disk therefor, a bearing memthreads, a sleeve mounted with a frame and an engine, mounted theredisk to engagethe wheel and i a driveishaft, a driven Wheel a driving disk rotatable With the shaft and movable thereon towardand from the driven Wheel for-engagement and vdis-engagement therewith, and a thrust mechanism for moving the drivingv disk out oflen gageinent vwith the Wheel,"

comprising an operatingmember and one or more slip plates engagingthe disk and retraotible by the said member. "lGLIna motor vehicleya drive shaft and a driven Wheel, a sleeve movable on said shaft, a disk carried by sa'id'sleeve and revoluble With the shaft, means for. moving the disk into and out of engagement with the Wheel, comprising a movable operating mem-v. ber and an antl-friction element carried by the said member,:the said elementbeing so arranged With respeet'tothe sleeve and disk G opies' of" this patent may Be obtained for five centseach; by ad I Washington, D. Gi

; the sleeve to in one direotion itbears against the 'di'skto advance it,and on'actuation of the operat-' ing member in another :direction it engages 17:. Inc'ombin'ation, a driveawheel; a drive: shaft, al'driving disk having'a sleeved hub" portion ,slidable on-said shaft, and' a'mean's for moving the disk into and out of engagement with said I Wheel 'eomprising an inner gbearing member about the'sleevefanouter v a member turnable'on sald bearing member,

and an] anti-friction element oarried'by the outer member to engagethesaid hub portion, to retract the disk.

' In testimony 'vvhereof have herenntol signed. myname in the subscribed Witnesses,

V Vitn esses: v

FQEJPLA E, 'w L. C

that on aotuation .'oftheoperating member 25 retract the disk to dis-engaged iposition. ":1

presence of the two MERRI LL." JE KINS.

dressing the Commissioner of Patents, i 

